Pump.



S. L. CALVERT.

PUMP.

APPLICATION FILED JULY]. W3.

RENEWED APR. 30, I915.

Patented Dec. 21, 1915.

2 SHEETS-SHEET 11 awuewtoz L. Call em s. L. CALVERT.

PUMP.

APPLICATION FlLED JULYI, 1913. RENEWED APR-30,1915.

Patented Dec. 21, 1915.

2 SHEETS SHEET 2.

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OKLAHOMA, ASSIGNOR O15 ONE-HALF TO CHARLES F. LEECH, OF BARTLESVILLE, OKLAHOMA.

PUMP.

Specification of Letters Patent.

Patented Dec. 21, 1915.

Application filed July 1, 1913, Serial No. 776,843. Renewed April 30, 1915. Serial No. 25,075.

To all whom it may concern Be it known that I, SEBASTIAN L. QaLvER'r, a citizen'of the United States, residing at Bartlesville, in the county of Washington and State of Oklahoma, have invented new and useful Improvements in Pumps, of which the following is a specification.

This invention is an improved oil pump oil wells and consists in the construction, combination and arrangement of devices hereinafter described and claimed, while the piston structure for the pump is described and claimed in a copending application filed July 17, 1914, and bearing Serial Number 861,551.

One object of the invention is to prov de an improved pump of this character which includes means for separating the sand and earthy particles from the oil while pumping the oil and causing the sand to be precipitated.

Another object is to efi'ect improvements in the construction of the plunger.

Another object is to effect improvements in the construction of the reducer for connecting the lower end of the sand chamber casing and the working barrel to the upper end of the intake pipe.

In the accompanying drawings: Figure 1 is a vertical sectional View of the operating parts of an oil well pump constructed in accordance with my invention. Fig. 2 is a detail elevation, on a larger, scale, of the plunger. Fig. 3 is a detail vertical sectional view of the same. Fig. 4 is a detail sectional view of the upper portion of the pump, showing the plunger tube valve and also showing the removable packing head in which the plunger tube operates. Fig 5 is a similar view of the lower portion of the pump, showing the lower or standing valve and its connections. Fig. 6 is a detail transverse sectional view on the plane indicated by the line w-a of Fig. 1.

In accordance with my invention, I provide an outer tubular body 1, which forms a casing for the sand chamber 2, the upper end of the said tubular body being connected by a suitable reducer 3 to the lower end of the pump tube 1 which reaches to the top of the Well and the lower end of the said outer tubular body 1 is screwed to the outer side of the upper portion of a reducer 5, the lower end of the reducer being connected by a sleeve 6 to the upper end of a perforated inlet tube 7, which is arranged in the bottom of the well and in which oil enters by the rock pressure.

In the upper portion of the reducer 5 is a threaded opening 8 in which is screwed the lower end of a tubular cage 9, the upper portion of which is closed as at 10 and provided with openings 11 in its wall, the said cage being formed with a valve seat 12 and a ball valve 13 being employed which is arranged in the upper portion of the cage and is adapted to close downwardly on the seat.

In the casing or outer barrel 1 is an inner or working barrel 14 which is of less diameter than the outer barrel, is spaced therefrom and the lower end of which is screwed to the upper end of the reducer as at 15. The upper end of the working barrel is provided with a conical seat 16 having a removable packing head 17 and to the upper end of the working body is screwed the reduced upper end 18 of a tubular or annular shield or apron 19 the diameter of which exceeds that of the working barrel so that the said shield or apron is arranged around and spaced from the upper portion of the work- 'ing barrel and in and spaced from the outer barrel 1. The lower end of the said shield or apron is open. The working barrel is provided near its upper end, at a point within the shield or apron with openings 20. The plunger 21 which is arranged to operate in the working barrel has a threaded central opening and is screwed to the lower end of a tube 22. Two pairs of split packing rings which are preferably made of brass and are indicated at 23-424 are arranged at some distance apart on the plunger tube, the lower member of the lower packing rings 23 bear ing directly on the plunger. A nut 25: i

screwed on the plunger tube 22 and b against the upper side of the upper ring and between the rings 2-1-25 are a seria valve cups 26 which are made of leather other suitable material and are separv upper end of the working valve.

from each other by washers 27 which are also arranged on the plunger tube 22 and are adapted to fit in the depressed central portions of the valve cups. The length of the plunger tube is such that its upper end extends above the working barrel. The plunger tube is free to move vertically through a central opening in the removable packing head 17 and the upper end of the plunger tube, which is somewhat reduced, is screwed to. the lower end of a cage 28 in which is a ball close downwardly on the seat 30 with which the cage is provided. The wall of the cage has openings 31 and the cage is closed at its upper end as at 32 and provided with a threaded stem 33 to which is screwed the lower end of a plunger rod 34 which extends to the upper end of the well and is employed to impart vertical reciprocating motion to the plunger and its plunger tube.

The removable packing head 17 is provided on its upper side with rings 35 which -fit. snugly around the plunger tube and while permitting the plunger tube to reciprocate prevent sand from going through the said removable packing head. The lower end of the removable packing head is tapered to fit snugly in theseat formed at the The removable packing head while forming a packing for the plunger tube at the upper end of the working barrel is readily removable from the working barrel when the plunger top is withdrawn therefrom.

In the operation of my improved oil pump, oil is sucked into the lower portion of the working barrel at each upstroke of the plunger with its tube 22 and valve 29, the valve 13 opening and the valve 29 closing. On each down stroke of the plunger, the valve 29 opens and the valve 13 closes and oil is forced upwardly through the plunger tube 22 and past the valve 29 into and upwardly in the tube 4. Y

The barrel or outer body 1 fills with oil as the result of the operations of the plunger and is kept full during the operation of the pump and such sand or other like material as is in the oil becomes precipitated and settles in the sand chamber 2 which is formed by the space between the barrel or outer body 1 and the working barrel 14. The openings 20 in the upper portion of the working barrel prevent air from being compressed therein and interfering with the opvalve 29 which is adapted to' vents sand from entering the upper portion of the working barrel.

The arrangement and construction of the parts of my improved oil pump are such as to greatly facilitate the assembling and disassembling of the same and, hence, enable all parts of the pump to be readily inspected and repaired, and also enable the sand which accumulates in the sand cham ber to be discharged therefrom periodically as needed.

While I have herein shown and described a preferred form of my invention, I would have it understood that changes may be made'in the form, proportion and construction of the several parts without departing from the spirit of the invention and within the scope of the appended claims.

I claim 1. In an oil pump, the combination of a working barrel, an outer barrrel around and spaced from the working barrel and forming a sand chamber between them, a standing valve at the lower end of the working barrel, a plunger arranged to operate in the working barrel and having a tube extending above the working barrel and being provided with an upwardly opening valve, said plunger comprising a tubular body having a diametrically reduced intermediate portion and a peripheral annular groove, packning rings fitted in the said grooves and cups on the reduced intermediate portions and said end portions, the said packing rings being adapted to fit loosely in the pump barrel and prevent sand or the like from getting to the cups, and a valve at the upper end of the working barrel and through which said tube extends.

2. In an oil pump, the combination of a working barrel, an outer barrel around and spaced from the working barrel and forming a sand chamber between them, a standing vali e at the lower end of the working barrel, a plunger arranged to operate in the working barrel and having a tube extending above the working barrel and provided with an upwardly opening valve, cups on said plunger, packing rings also on said plunger and arranged above and below the cups, and a packing head at the upper end of the working barrel and through which said plunger tube extends.

3. In an oil pump, the combination of a. working barrel, an outer barrel disposed in spaced relation concentrically about said working barrel and defining a sand chamber by the intervening space therebetween, a standing valve at the lower end of said working barrel, a plunger arranged to operate in said working barrel and having a portion extending above said barrel, an upwardly opening valve associated with said extended portion of the plunger, a packing.

head surrounding said plunger above the working barrel, a tubular apron disposed concentrically about said working barrel and spaced therefrom and from said outer barrel, saidapron having a reduced end portion associated with the upper end of said working barrel, and a packing surrounding said plunger and snugly engaging the Walls thereof and. said working barrel.

In testimony whereof I afiix my signature in presence of two Witnesses.

SEBASTIAN L. CALVERT. 

